Improvement in dust-conveying attachments for thrashing-machines



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fusbonveying Attachments for Thrashing-Mathines.l 910.139,28@ Patented May`27,1873.

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Dust Conveying Attachments for Thrashing-Manninps` WITNESSES INVENTOR` PATENT OFFICE JACOB BIERBOWER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF HIS 'RIGHT TO AARON KAUFFMAN, OF SAME PLAGE.

IMPROVEMENT IN DUST-CONVEYING ATTACHMENTS FOR THRASHlNG-MACHINES.

Specification forming part of LettersLPatent No. 139,289, dated May 27, 1873; application filed v December 17, 1872.

To all whom it may concern.-

Beit known that I, JACOB BIERBOWER, of the, city of Philadelphia and State of Pennsylvania, have invented certain Improvements in Dust-Conductors for Thrashing-Machines, of which the following is a specification:

My invention consists of an attachment to a thrashing-machine, for carrying oft the dust produced in the process of thrashing, which has perforated tubes for collecting the dust, a fan-blower, and a dischargin g-trunk, combined and arranged as hereinafter fully described.

Figurel is a plan View of the dust-conductor. Fig. 2, Sheet No. 2, is a side elevation ot' the machine. Fi g.3, Sheet No. 3, is a cross-section at the line a b of Fig. 1, the fan B being removed. t

Like letters in all the gures indicate the same parts.

A is the case, which sustains the fan B. It is secured on the top of the thrashing-machine by means ot bolts or otherwise. O C are perforated tubes, so arranged in relation to the thrashing-machine as to admit ofthe dust arising from the latter being drawn through by the action of the fan B as it draws air into the chamber D of the case A, the middle portion of one of the tubes being arranged at the front of the machine and that of the other tube at the rear of the same. The dust is drawn throughthe perforations from the front and rear as well as from the sides thereof by the action of the fan, as hereinafter described. The ends of the tubes connect with the extensions a a on the sides of the case and have a free communication with the recesses b b of said extensions, which are connected with the fanchamber D. E E are vertical tubes which lead into the recesses b b for feeding air to the fan. F is a trunk through which air and dust are blown out of the fan. I have represented the tubes E E as made of metal; yet it will be seen that gutta-percha or other material will answer the same purpose. When made of gutta-percha or other flexible material I would connect them with the case by means of collars projecting from the case, or in any other convenient manner. Abelt not shown in the drawings connects the. pulley Gr to a pulley on the shaft of the thrashing-machine, or otherwise located in relation to the motive power. The fan B, being driven in the direction of the arrows, tends to create a vacuum in the tubes O O, and consequently draws air through their perforations, and the dust which arises from the thrashingmachine into thefan-chamber D, whence it is blown by the fan, through the trunk F, to any desired point.

I do not claim, broadly, the employment of a fan and tubes for the removal of dust from a thrashing-machine, as they are shown inthe patents of J. B. Hunsberger, dated June 11 and November 19, 1872, in` which plain tubes are used, which take in the dust from the sides of the thrashing-machine, only,while mine are perforated and are so constructed and arranged in relation to the machine as to admit of the i dust being withdrawn from the front and rear of the machine as Well as from its sides, as

above mentioned and illustrated in the drawings. v

I claim as my invention- In a dust-conveying attachment for thrashing-machines, the combination of the fan, perforated tubes G O, and trunk F, substantially as and for the purpose described.

J ACOB BIERBOWER. Witnesses:

THOMAS J. BEWLEY, STEPHEN UsTIcK. 

